There is an AUR package that errors when I update it, and it has been like that for a while so I wondered if I could fix it myself?
The Package is here https://aur.archlinux.org/packages/filebrowser-bin
You can see my comment explaining the error under the username “mub”.
Aside from downloading and changing PKGBUILD directly, there is an AUR helper named Paru that shows the PKGBUILD contents before using it to build the package. I’m not sure, but seems like it opens inside a terminal text editor, so you can make changes before building.